Kang Lei, Lin Zheshuai
Functional Crystals Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Light Sci Appl. 2022 Jul 1;11(1):201. doi: 10.1038/s41377-022-00899-1.
Deep-ultraviolet (DUV, wavelength λ < 200 nm) nonlinear optical (NLO) crystal is the core component of frequency conversion to generate DUV laser, which plays an important role in cutting-edge laser technology and fundamental science. Significant progress has been made in both experimental exploration and theoretical design in the field of DUV NLO crystals over the past three decades. In-depth insight into "structure-property correlations", in particular, allows for rigorous and precise identification of DUV NLO crystals. In this article, we reviewed the current experimental and theoretical research progress while elucidating the core concepts and stringent criteria of qualified DUV phase-matched second-harmonic generation crystals. We also discussed the development of the DUV NLO "structure-property correlations" from first principles and how it has sparked interest in related materials, as well as future directions for obtaining potential DUV NLO crystals.
深紫外（DUV，波长λ < 200 nm）非线性光学（NLO）晶体是产生深紫外激光的频率转换核心部件，在前沿激光技术和基础科学中发挥着重要作用。在过去三十年里，深紫外非线性光学晶体领域在实验探索和理论设计方面均取得了显著进展。特别是对“结构-性能相关性”的深入洞察，有助于严格且精确地识别深紫外非线性光学晶体。在本文中，我们回顾了当前的实验和理论研究进展，同时阐明了合格的深紫外相位匹配倍频晶体的核心概念和严格标准。我们还从第一性原理讨论了深紫外非线性光学“结构-性能相关性”的发展情况，以及它如何引发了对相关材料的兴趣，还有获得潜在深紫外非线性光学晶体的未来方向。
